Cross-national comparison of soundscape in urban public open spaces between China and Croatia

There are similarities and differences between open public space soundscape evaluation in different countries, mainly due to the influence of cultural background. This paper systematically compares the effect of social-cultural context on soundscape of urban public open spaces in China and Croatia. Eleven well-known and typical squares were selected. A series of questionnaire surveys within the soundscape framework were carried out during the summer season, and gathered data were analyzed. Principal component analysis (PCA) resulted in two principal components, eventfulness and pleasantness, as notable soundscape factors. However, eventfulness is the major factor in China, and pleasantness is the major factor in Croatia. In terms of environmental satisfaction, natural condition is the major factor based on PCA. Urban condition is the second factor in China, however, it is the third factor in Croatia. It is interesting to note that the physical environment is the most important factor in Croatian inland and coastal places, which is different compared to Chinese places. Visit purpose is the dominant factor associated with sound and environmental satisfaction. Natural sound and children have mainly positive correlations to sound and environmental satisfaction in China, whereas sounds of human activities have mainly negative correlations to sound and environmental satisfaction in Croatia

Speaker discrimination in multisource environments auralized in real rooms

With the recent development of audio in modern VR/AR systems and the increasing capability of synthesizing natural sound fields over headphones with head tracking, the question of the ability of our hearing system to discriminate multiple concurrent sound sources has become important again. We must understand how psychoacoustical and psychophysical limitations of the hearing system cope with novel technologies of virtual acoustics that can simulate an almost unlimited number of sound sources. Previous research has shown that the capacity of human hearing to discriminate a reference sound source is limited when there is background noise, a reverberant surrounding, or when other, disturbing sound sources simultaneously mask the reference source. A set of listening tests based on the cocktail-party effect was designed to determine the intelligibility of speech emitted by a reference sound source, with one to six disturbing sound sources simultaneously emitting speech from different directions around the listener. The tests were repeated in three test rooms with different acoustical properties, and two test signals were used: logatomes and regular spoken sen-tences with specific keywords. The results have revealed the changes in speech intelligibility scores in relation to the number of disturbing sources, their positions, and acoustical properties of test rooms

Using Virtual Soundwalk Approach for Assessing Sound Art Soundscape Interventions in Public Spaces

This paper discusses the soundscape assessment approaches to soundscape interventions with musical features introduced to public spaces as permanent sound art, with a focus on the ISO 12913 series, Method A for data collection applied in a laboratory study. Three soundscape interventions in three cities are investigated. The virtual soundwalk is used to combine the benefits of the on-site and laboratory settings. Two measurement points per location were recorded—one at a position where the intervention was clearly perceptible, the other further away to serve as a baseline condition. The participants (N = 44) were exposed to acoustic environments (N = 6) recorded using the first-order Ambisonics microphone on-site and then reproduced via the second-order Ambisonics system in laboratory. A series of rank-based Kruskal–Wallis tests were performed on the results of the subjective responses. Results revealed a statistically significant positive effect on soundscape at two locations, and limitations related to sound source identification due to cultural factors and geometrical configuration of the public space at one location

Post-hoc analysis of two temporary acoustic shelters in London

The research focuses on two temporary pavilions designed as acoustic shelters in an urban open space: the Serpentine Gallery Pavilion built in the forecourt of the Serpentine Gallery in Kensington Gardens in 2011 and the Be Open Sound Portal pavilion built at Trafalgar Square in 2012, both heritage sites in London. Swiss architect Peter Zumthor designed the former pavilion, while the latter was designed by the English firm Arup. It was recognized that the same soundscape design model - an acoustic shelter - was applied in open spaces of a different aural context. Both were dismantled before the time of this research. With an aim to show the types of soundscape from which acoustic shelters in an urban open space could shield, monaural onsite measurements were performed in October 2015 to analyze aural context differences between the immediate surroundings of the two former pavilions. The difference is clearly visible in the frequency of sonic events, their spectral composition and average sound pressure levels